* multisens - Synestesia - Multi-senses perception. Haïkus using effects on several senses (hearing, touch, taste, vision, smell). They play on the phenomenon of resonance between feelings (Synesthesia). This device usually produces strong haikus because they are physical.

* absence - The main element is not explicit. The haiku is structured around an unnamed element to which each image refers. The interest is to save the space that would be used by naming the element while having the effect it produces.

The haiku can appear as a vault from which the scaffolding has been removed. If the haiku is well composed, the main element is absent but everything refers to it.

This technique delays storage in memory because the reader must complete the discourse with the unnamed element so that the haiku is unambiguously understandable. It then acquires a higher memory weight.